Lynn Collins is basking in the birthday love in her bathing suit. The actress celebrated her special day in an orange bathing suit, expressing gratitude for all the love from her fans. "Thank you ALL for the beautiful birthday wishes," she captioned the post. How does she stay so fit? Read on to see 5 ways Lynn Collins stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

Lynn maintains a healthy diet. "While I was shooting and while I was training for the role, I had to eat some sort of protein and complex carbohydrate every three hours," she told Female First about how she got into shape for her role in John Carter. When she isn't prepping for a role, she still eats clean. "I eat a lot of yogurt because probiotics are super-good for your skin. I'm a skin fanatic, so I also eat a lot of fish and a lot of sushi. In fact, I have to watch it sometimes because I can eat too much," she added. 

Lynn also drinks her nutrients, consuming "a lot of shakes during the filming of John Wick. "However, they were wonderful shakes, so I didn't suffer. They were raw vegan shakes, so my skin was amazing during the film shoot. I also drank a lot of smoothies and watermelon juice because that clears the water out of your system. I'm a big water retainer, so it all really helped," she added. 

Lynn had to "work out all the time, which was physically demanding – but it was all worth it," for John Wick. "I would box a lot, plus do a ton of weightlifting and running. And, of course, we would have our sword training sessions, which were brutal. Sword fighting is such a workout – and so much fun."

Lynn abstains from alcohol. "I'm from Texas and my real weakness is beer. I don't drink anymore, though. Instead, I drink non-alcoholic beer. That's my poison now, and I love it," she said. 

Lynn spends a lot of time in nature, going for long walks and hikes. One study published in JAMA Internal Medicine found that walking at a brisk pace for about 30 minutes a day led to a reduced risk of heart disease, cancer, dementia and death, compared with walking a similar number of steps but at a slower pace.

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